Question

A uranium-238 nucleus, initially at rest, emits an
(He) particle with energy E. The recoil speed of
residual nucleus thorium-234 is (Masses are same
as their mass number)​

Answer 1

E = 1/2mv^2

2E = 234v^2

bcoz masses are same as their mass number

v = √E/117

Answer 2

Answer:√2E/117

Explanation:

Hope u understand